Topic: panasonic or primo capsule for lapel mic?

[haryo]

I'd like to make myself a lapel mic for recording my own lectures on an iriver ifp-899 mp3 player/recorder. I'm debating between the panasonic wm-61A capsule or the prima capsule BT-EM158  ( http://www.frogloggers.com/BT%20EM158.htm ). The primo looks quieter, but the frequency response is more ragged (which may not matter too much for just a voice recording). Any opinions appreciated.